8.L/P Evolution + Earth Hist Crossword
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
 
 
Down: 1) -"Middle" era of fossils -Dinosaurs, large reptiles -Flowering plants appear2) Scientists drill deep into ice sheets producing ice cores hundreds of meters long. This can tell us about past climate!3) More than 3 billion years ago, first era! eukaryotes developed about 2/3 of the way through the era. Soft-bodied invertabrates formed No fossils yet since all soft5) fossils in which minerals replace all of an organism, or part such as a dinosaur bone minerals6) forms when entire organism or parts of organs are prevented from decaying by being trapped rock, amber, or tar8) Uses radioactive decay of elements (how much has decayed?) to tell absolutely how old rocks are11) A track, trail, or burrow left in the geologic record by a moving animal.13) principle that all living things descended from one organism that evolved into many different branches14) The gradual change in a species over time19) Chemical inside all life that codes it-- the "instruction manual" that creates your traits Across: 2) fossils of organisms that existed only during specific spans of time over large geographic areas. Help us tell how old rocks are!3) Change to internal organisms to survive an environment4) -Most ancient era with fossils -Many invertebrates like trilobites, crabs -First life on land like amphibians7) Rock formed from hardened sediment. In layers9) A hollow area in sediment in the shape of an organism 10) Earth's continents move around over millions of years12) Scientist who discovered natural selection15) New rock formed from cooled magma16) Current era Humans appear Flowering plants take over17) Older rock layers are under younger ones18) A structure that enables an organism to survive in it's environment. Ex: long neck20) Form when a mold is filled with sand or mud that hardens and shapes into the organism21) A behavior that enables an organism to survive its environment.22) forms when organisms re pressed between layers of soft mud or clay that hardens squeezing almost all decaying organisms away leaving the carbon imprint. Black and shiny23) Variety of different versions of same genes/traits
 

 

Create your own Crossword Puzzle for Free!		  Show Errors as I Type